Professor Diesel

Professor Diesel

How to exercise an unused engine By PMY Staff \| Posted May 2012 Caring for engines after a not-too-long hiatus. Read Article	How do I check for engines damaged by forgetting to open seacocks? By PMY Staff \| Posted April 2012 I left my marina with my seacocks closed... Read Article
Are end-of-season oil changes really necessary? By PMY Staff \| Posted January 2012 Should we do end-of-season oil changes or can we stretch the old oil into the next season? Read Article	How do I care for my unused engine? By \| Posted November 2011 I plan on being away from my boat for two to three months and during that time, I plan on having someone periodically run my diesels dockside... Read Article
Does an increase in horsepower explain a rise in exhaust temperature? By \| Posted October 2011 Question: I have a 1989 38-foot Bayliner with twin 175-hp Hino diesels that have been retrofitted with turbochargers, thus raising each engine to 210 horsepower. As I go... Read Article	Can switching motor oil viscosity harm my engine? By \| Posted September 2011 Question: The boys at the Ko Olina harbor are having a heated discussion concerning motor oil. Since Costco hit town, we’ve all been able to buy Chevron 15W-40 Delo... Read Article
Using synthetic oils in older engines By \| Posted August 2011 Question: I own a 1996 43-foot Hatteras with twin six-cylinder Detroit Diesel engines. I change the oil approximately every 100 hours of operation. At this point, I have 1,... Read Article	Vintage Yanmars Running Hot By \| Posted June 2011 Question: I have a 29 Phoenix with twin, 1984-vintage, 170-hp Yanmar diesels with 1,000 hours on them. While the boat seems to run fine, I have one issue. During operation... Read Article
Idling diesel engines By \| Posted May 2011 Question: My mechanic friends tell me not to let my diesel engine idle for long. They say that it should either be under load or turned off. I hear a lot of diesel engines in... Read Article	Trouble-shooting an overheating boat engine By \| Posted April 2011 Question: I have a 1990 Carver Yacht with two 375-hp Caterpillar 3208 diesels. The starboard engine works fine, but at 2000 rpm the port engine overheats. Once the temperature... Read Article
Seasonal Storage For Fuel Tanks By \| Posted March 2011 Question: When I took your one-day Introductory Diesel Maintenance Course several years ago, I forgot to ask one question: What is the best way to lay up a fuel tank for... Read Article	Aluminum in engine oil By \| Posted February 2011 Question: I just did my first oil analysis on my Cummins 6BTA diesel, and the results seem somewhat disconcerting. According to the report, there was aluminum in the oil at... Read Article
Caterpillar 3208 low rpm By \| Posted January 2011 Question: I have a 1989 Sea Ray with 375-hp Caterpillar 3208 diesels. Last year I overheated one of them and blew a head gasket. Overheating had been a problem for some... Read Article	Onan genset spewing black smoke By \| Posted December 2010 Question: I have a 4-kW Marine Onan genset with 600 hours on it. If I let it run for a lengthy period it produces so much black smoke that a residue discolors the hull around the... Read Article
Noisy Engines By \| Posted November 2010 Question: I have a pair of Detroit Diesel 6-71 TIBs in my 1990 Ocean 48 Super Sport. I love both the boat and the motors, but the Detroits have always been loud at the exhaust end... Read Article	Twin Engine Temperature Disparity By \| Posted October 2010 Question: I have a 1994 Mainship 31 with a pair of 315-hp Yanmar diesels with 2,000 hours on them. While running at full throttle (about 33 knots) for five minutes, the starboard... Read Article
Algae On My Racor By \| Posted September 2010 Question: While performing routine maintenance on my Caterpillar C7, I was surprised to find a substance about the size of a quarter at the top of my Racor—it looked like... Read Article	Professor Diesel By \| Posted November 2009 Q. I have a 2003 Sea Ray Sundancer 420 and am moving from the New York City area to Florida soon. Do I need to do anything different in Florida in terms of boat maintenance? I am... Read Article
Getting your engine ready for launch in the spring By \| Posted February 2009 Question: I’ve always wondered if there was anything special I should do when getting my boat ready for launch in the spring. My mechanic says no, just start her up,... Read Article

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